CN106836250A - Ultrasonic wave frequency conversion composite water-reducing method - Google Patents
Ultrasonic wave frequency conversion composite water-reducing method Download PDFInfo
- Publication number
- CN106836250A CN106836250A CN201611251655.1A CN201611251655A CN106836250A CN 106836250 A CN106836250 A CN 106836250A CN 201611251655 A CN201611251655 A CN 201611251655A CN 106836250 A CN106836250 A CN 106836250A
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- pumped well
- silo
- supersonic generator
- well
- water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of ultrasonic wave frequency conversion composite water-reducing method, pumped well and silo are opened up the region for carrying out precipitation treatment is needed, supersonic generator is set in silo, immersible pump and wireway are set in pumped well, wireway is connected with the vacuum extractor outside pumped well, then pumped well top is sealed；Start vacuum extractor to extract air in pumped well out, be then turned on immersible pump by outside the body of groundwater out well in pumped well；When the level of ground water no longer continuous decrease in pumped well and silo, supersonic generator is driven to produce compressional wave formation longitudinal wave field in stratum around, water body is flow in pumped well along longitudinal wave propagation direction in promoting formation pore during longitudinal wave propagation, then passes through drainpipe water body pump drainage to ground by immersible pump.The invention has the advantages that design principle science, device structure be simple, low cost, precipitation work efficiency high.Engineering construction precipitation time is shortened, precipitation efficiency is improve.
Description
Technical field
The present invention relates to the precipitation method used after engineering construction precipitation pore-forming/well, more particularly, to a kind of ultrasonic wave
Frequency conversion composite water-reducing method.
Background technology
In engineering construction, when level of ground water is higher than the engineering construction scope of operation, it is necessary to be reduced using certain method
Level of ground water, meets the requirement of dry work operation, it is ensured that engineering construction quality.Engineering needs to carry out precipitation work in construction period
During industry, its means taken has various, such as light well point method, tube well method or bright ditch pump drainage method.These precipitation method form lists
First, adaptability is relatively low, precipitation time is more long, and every kind of method can only be directed to some earth formations, and its dewatering effect also receives hole or well
Construction quality influence it is very big.It is applicable as the precipitation depth of light well point method is limited and takes certain construction site, tube well method
In single middle fine grained stratum of earth formation etc..
At present, the method that all engineering construction precipitation are used be by water body in stratum under certain hydraulic gradient
It is interpore to flow naturally, therefore flow rate is smaller, and flow rate is by formation particles composition and the uniformity shadow of structure
Ring.When particularly carrying out Dewatering operation in cohesive soil stratum, want to meet the ageing of engineering construction precipitation, i.e. time
Short, effect is good, it is necessary to increase the flowing velocity of water body in stratum.
The content of the invention
Present invention aim at providing that a kind of dewatering effect is good, the time is short, efficiency high and by earth formation do not limited and dug
The ultrasonic wave frequency conversion composite water-reducing method of quality influence during hole/well.
To achieve the above object, the present invention takes following technical proposals：
Ultrasonic wave frequency conversion composite water-reducing method of the present invention, including following construction procedures：
The first step, the region for carrying out precipitation treatment is being needed to open up pumped well and silo；
Second step, in the silo vertical lift device is set, is positioned over supersonic generator by the lowering or hoisting gear
Position below phreatic line in silo, the supersonic generator controls dress by cable with the pulse signal outside silo
Put and be connected, then seal silo top；
3rd step, vertical lift device is set in the pumped well, immersible pump is positioned over by pumped well by the lowering or hoisting gear
Position below interior phreatic line, the drainpipe and power line of the immersible pump are caused outside pumped well, and in pumped well
Wireway is set in cavity more than lower waterline, the wireway is connected with the vacuum extractor outside pumped well, then
Pumped well top is sealed；
Phreatic line in pumped well is extracted out and makes the sky by the 4th step, the startup vacuum extractor with the air in upper plenum
Relative degree of vacuum is maintained between -90~-100Kpa in chamber；The immersible pump is then turned on by the body of groundwater in pumped well
Outside out well；When the no longer continuous decrease of the level of ground water in pumped well and silo, i.e. underground water in pumped well and silo
When position reaches a dynamic equilibrium, start the pulse signal control device and send ultrasonic pulse to the supersonic generator
Signal, drives supersonic generator to produce compressional wave formation longitudinal wave field in stratum around, and stratum is promoted during longitudinal wave propagation
Water body is flow in pumped well along longitudinal wave propagation direction in hole, then passes through drainpipe water body pump drainage to ground by immersible pump；
5th step, in other predetermined positions the first step to the 5th step is repeated successively, reach the pore water purpose in drainage stratum.
The frequency of oscillation of the supersonic generator is believed with the ultrasonic pulse transmitted by the pulse signal control device
Number frequency is consistent, and the formation characteristics parameter that the frequency values carry out precipitation treatment region as needed calculates gained；Ultrasonic wave occurs
Device is shaped as rectangle tabular body, semicircular body, cylinder or spot film thread like body.
The invention has the advantages that design principle science, device structure be simple, low cost, precipitation work efficiency high.Due to super
There is the compressional wave that sonic generator is launched compression to promote characteristic, cavitation, viscosity reduction effect during full water earth-layer propagation
It is easier in pore channel be flowed along longitudinal wave propagation direction Deng so that the water body in stratum in longitudinal wave field, at double fast
The one-way flow speed of speed increase water body, is flowed in pumped well by silo side, i.e. the displacement increase of pumped well, is accelerated
The drainage speed on stratum, so as to shorten engineering construction precipitation time, improves precipitation efficiency.
Brief description of the drawings
Fig. 1 is the equipment arrangement schematic diagram for implementing the inventive method.
Fig. 2 is the overlooking the structure diagram of vertical lift device of the present invention.
Specific embodiment
As shown in Figure 1-2, ultrasonic wave frequency conversion composite water-reducing method of the present invention, is carried out as steps described below：（It is following
Pumped well and silo are multiple, for ease of description, are described by taking a pumped well and a silo as an example below.）
The first step, the region for carrying out precipitation treatment is being needed to open up pumped well 1 and silo 2；The oscillation frequency of supersonic generator
Rate is consistent with the ultrasonic pulse signal frequency transmitted by pulse signal control device, and the frequency values are carried out at precipitation as needed
The formation characteristics parameter for managing region calculates gained；The shape of supersonic generator according to actual needs, may be selected to be rectangular slab
Shape body, semicircular body, cylinder or spot film thread like body；
Second step, the first vertical lift device is set, by the first lowering or hoisting gear by supersonic generator in the silo 2
3 are positioned over phreatic line position below 4 in silo 2, and the supersonic generator 3 is passed through outside cable 5 and silo 2
Pulse signal control device 6 is connected, then by the sealing of the top of silo 2；
3rd step, the second vertical lift device of setting in the pumped well 1, are placed immersible pump 7 by the second lowering or hoisting gear
In the position below 8 of phreatic line in pumped well 1, the drainpipe 9 and power line of the immersible pump 7 are caused outside pumped well 1, and
Wireway 11 is set in pumped well 1 in the cavity 10 of phreatic line more than 8, by outside the wireway 11 and pumped well 1
Vacuum extractor 12 is connected, then by the sealing of the top of pumped well 1；
Phreatic line 8 in pumped well 1 is extracted out and made by the 4th step, the startup vacuum extractor 12 with the air in upper plenum 10
Relative degree of vacuum is maintained between -90~-100Kpa in the cavity 10；The immersible pump 7 is then turned on by pumped well 1
Body of groundwater out well outside；When the no longer continuous decrease of the level of ground water in pumped well 1 and silo 2, i.e. pumped well 1 and transmitting
When phreatic line 13 in well 2 reaches a dynamic equilibrium, start the pulse signal control device 6 and sent out to the ultrasonic wave
Raw device 3 sends ultrasonic pulse signal and drives supersonic generator 3 to produce compressional wave 14, forms longitudinal wave field in stratum around,
Water body is flow in pumped well 1 along the direction of propagation of compressional wave 14 in promoting formation pore in the communication process of compressional wave 14, then by immersible pump 7
By drainpipe 9 water body pump drainage to ground；
5th step, in other predetermined positions the first step to the 5th step is repeated successively, reach the pore water purpose in drainage stratum.
The frequency of oscillation of the supersonic generator 3 and the ultrasonic pulse transmitted by the pulse signal control device 6
Signal frequency is consistent, and the formation characteristics parameter that the frequency values carry out precipitation treatment region as needed calculates gained, i.e.,：
In formula：It is hydrostatic density, kg/m3；It is variable density amount, kg/m3；P is the acoustic pressure in liquid, Pa；U is position
Move speed, m/s；X is vibration wave propagation distance, m；T is time, s；C0It is the velocity of sound in liquid, m/s；It is liquid on stratum
Interior percolation flow velocity, m/s；It is resistance coefficient；Supersonic generator 3 is shaped as rectangle tabular body, semicircular body, cylinder
Or spot film thread like body.
First vertical lift device is identical with the second vertical lift device structure, by upper support ring, lower support ring, and
The vertical rod 15 for connecting the upper and lower support ring is constituted；Upper support ring is identical with lower supporting ring structure, as shown in Fig. 2 by inner ring
16th, outer shroud 17 and connect the cross bar 18 of the inner and outer rings 16,17 and be evenly distributed the multiple rollings being arranged on outer shroud 17
Wheel 19 is constituted, and the inner ring 16 of the upper/lower terminal of the vertical rod 15 respectively with upper support ring and lower support ring is connected.When using, will
First, second vertical lift device is positioned in pumped well 1 and silo 2 by lifting rope.
Claims (2)
1. a kind of ultrasonic wave frequency conversion composite water-reducing method, it is characterised in that：It includes following construction procedures：The first step, need
The region for carrying out precipitation treatment opens up pumped well and silo；
Second step, in the silo vertical lift device is set, is positioned over supersonic generator by the lowering or hoisting gear
Position below phreatic line in silo, the supersonic generator controls dress by cable with the pulse signal outside silo
Put and be connected, then seal silo top；
3rd step, vertical lift device is set in the pumped well, immersible pump is positioned over by pumped well by the lowering or hoisting gear
Position below interior phreatic line, the drainpipe and power line of the immersible pump are caused outside pumped well, and in pumped well
Wireway is set in cavity more than lower waterline, the wireway is connected with the vacuum extractor outside pumped well, then
Pumped well top is sealed；
Phreatic line in pumped well is extracted out and makes the sky by the 4th step, the startup vacuum extractor with the air in upper plenum
Relative degree of vacuum is maintained between -90~-100Kpa in chamber；The immersible pump is then turned on by the body of groundwater in pumped well
Outside out well；When the no longer continuous decrease of the level of ground water in pumped well and silo, start the pulse signal control device to
The supersonic generator sends ultrasonic pulse signal, drives supersonic generator to produce compressional wave to be formed in stratum around and indulges
Wave field, water body is flow in pumped well along longitudinal wave propagation direction in promoting formation pore during longitudinal wave propagation, then by immersible pump
By drainpipe water body pump drainage to ground；
5th step, in other predetermined positions the first step to the 5th step is repeated successively, reach the pore water purpose in drainage stratum.
2. ultrasonic wave frequency conversion composite water-reducing method according to claim 1, it is characterised in that：The supersonic generator
Frequency of oscillation is consistent with the ultrasonic pulse signal frequency transmitted by the pulse signal control device, and the frequency values are as needed
The formation characteristics parameter for carrying out precipitation treatment region calculates gained；Supersonic generator is shaped as rectangle tabular body, semicircle
Body, cylinder or spot film thread like body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251655.1A CN106836250A (en) | 2016-12-30 | 2016-12-30 | Ultrasonic wave frequency conversion composite water-reducing method |
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| CN201611251655.1A CN106836250A (en) | 2016-12-30 | 2016-12-30 | Ultrasonic wave frequency conversion composite water-reducing method |
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| CN106836250A true CN106836250A (en) | 2017-06-13 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158486A (en) * | 1984-05-09 | 1985-11-13 | Nit Co Ltd | A method and apparatus for forming an underground solidification structure |
| CN101581701A (en) * | 2009-06-23 | 2009-11-18 | 中南大学 | Method for detecting slip casting effect on ground surface |
| CN103290829A (en) * | 2013-05-13 | 2013-09-11 | 秦作栋 | Method for improving groundwater recharging efficiency by utilizing fluctuating waterflow |
| CN103669330A (en) * | 2013-12-06 | 2014-03-26 | 邓立新 | Ultrasonic vacuum preloading method |
| CN205421225U (en) * | 2015-10-15 | 2016-08-03 | 浙江海洋学院 | Ultrasonic wave soft soil foundation treatment system |
| CN205444215U (en) * | 2015-12-28 | 2016-08-10 | 上海广联环境岩土工程股份有限公司 | Gas drive foundation pit dewatering system |
-
2016
- 2016-12-30 CN CN201611251655.1A patent/CN106836250A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158486A (en) * | 1984-05-09 | 1985-11-13 | Nit Co Ltd | A method and apparatus for forming an underground solidification structure |
| CN101581701A (en) * | 2009-06-23 | 2009-11-18 | 中南大学 | Method for detecting slip casting effect on ground surface |
| CN103290829A (en) * | 2013-05-13 | 2013-09-11 | 秦作栋 | Method for improving groundwater recharging efficiency by utilizing fluctuating waterflow |
| CN103669330A (en) * | 2013-12-06 | 2014-03-26 | 邓立新 | Ultrasonic vacuum preloading method |
| CN205421225U (en) * | 2015-10-15 | 2016-08-03 | 浙江海洋学院 | Ultrasonic wave soft soil foundation treatment system |
| CN205444215U (en) * | 2015-12-28 | 2016-08-10 | 上海广联环境岩土工程股份有限公司 | Gas drive foundation pit dewatering system |
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Application publication date: 20170613 |
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